#### Transcript Comparing and Ordering Decimals PPT

```Comparing and
Rounding Decimals
Christine Berg
Edited V Hamilton
Comparing Decimals
• Decimal
Models
• Equivalent
Decimals
• Number Line
Decimal Models
Tenth
Hundredth
Equivalent Decimals
• Decimals
that represent
the same value
• Example:
0.6 is equivalent to 0.60
0.6 = 0.60
Terminal Zeroes
• Zeroes
as last
digit(s) of a number
can be removed
0.6 = 0.60
Equivalent Decimals
0.6
0.60
Comparing Decimals
Step 1:
Stack all the numbers being
compared so that all the place
values are lined up.
87.0413
87.09
Comparing Decimals
Step 2:
are the same number of
decimal places
87.0413
87.0900
Comparing Decimals
Step 3:
Underline the first number
that is different in the
numbers being compared
87.0413
87.0900
Comparing Decimals
Step 4:
Looking at the underlined digit, you
can not tell which number is larger. It
does not matter if there are
underlined!
87.0413
87.0900 THIS NUMBER IS LARGER!
Comparing Decimals
Step 4:
Order numbers depending on
the directions given. Pay
close attention to whether
you’re supposed to order
from least to greatest or
greatest to least!
Which is greater:
0.6 or 0.58 ?
0.60
0.58
0.6 > 0.58
Which is greater:
0.6 or 0.58
0.6
0.58
Rounding Decimals
Step 1:
Underline decimal
place we are
rounding
Rounding Decimals
Step 2:
Circle the number to
the right of the
underlined decimal
place
Rounding Decimals
Step 3:
If circled digit is greater
than or equal to 5, then
round the underlined
Rounding Decimals
Step 4:
If circled digit is less
than or equal to 4,
leave the underlined
number the same
Rounding Decimals
Try these:
1)Round 1.05 to the
nearest tenth
2) Round 0.123 to the
nearest tenth
Rounding Decimals